JP2018198387A - Image reader - Google Patents

Abstract

To provide an image reader in which at least any one or both of homogenization of reading qualities on a first side and a second side of a document and homogenization of reading qualities in a document conveyance direction is/are considered.SOLUTION: An image reader includes: a document support portion to support a document before being fed; feeding means for sending a document supported by the document support portion to a downstream side; a reverse roller to curve downward a document sent out from the document support portion to be reversed; one reading means for reading a document exiting from a curved reversing path formed by the reverse roller; and discharge means for discharging a document read by the reading means.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an image reading apparatus that reads a document.

  Some scanners as an example of an image reading apparatus are provided with an automatic document feeder (also referred to as ADF (Auto Document Feeder)) and configured to automatically feed and read a plurality of documents ( For example, see Patent Document 1).

JP2015-124080A

  In the image reading apparatus, it is desirable that the reading quality of the first side and the reading quality of the second side of the original be made uniform. In addition, even on a specific surface (first surface or second surface), variations in the reading quality in the transport direction are not preferable. For example, it is not preferable that there is a difference in reading quality between the document leading edge region and the document trailing edge region.

In the image reading apparatus described in Patent Document 1, reading is performed on the first surface and the second surface of the document by providing two image sensors across the document conveyance path. Accordingly, the cost of the apparatus is increased, and a difference between the reading quality of the first surface and the reading quality of the second surface tends to occur.
Further, the image reading apparatus described in Patent Document 1 has a configuration in which an original is read by an image sensor before the original is curved and reversed by a conveyance roller. For this reason, the conveyance accuracy is temporarily disturbed due to an increase in conveyance resistance when the leading edge of the document enters the curved reversal path, and for example, there is a possibility that the reading accuracy of the document leading edge region is lowered.

  Therefore, the present invention has been made in view of such a situation, and the purpose thereof is to homogenize the reading quality of the first surface and the second surface of the document, to homogenize the reading quality in the document transport direction, It is an object of the present invention to provide an image reading apparatus that takes into account at least one of the above or both.

  In order to solve the above problems, an image reading apparatus according to a first aspect of the present invention includes a document support unit that supports a document before feeding, and a feed unit that feeds the document supported by the document support unit downstream. A feeding means, a reversing roller for bending and reversing a document sent out from the document support portion, a reading means for reading a document that has slipped out of a curved reversing path formed by the reversing roller, and the reading means. And a discharge unit that discharges the document that has been read.

According to this aspect, the document sent from the document support unit is configured to bend downward and to be inverted, and is configured to read the document that has exited from the curve inversion path, so that the leading edge of the document enters the curve inversion path. Disturbance in transport accuracy does not affect the reading result. Since the inside of the curve reversing path is formed by the reversing roller, the conveyance load of the document in the curved reversing path is suppressed, and a decrease in conveyance accuracy can be suppressed.
With the above configuration, it is possible to achieve a configuration in consideration of homogenization of the reading quality in the document conveyance direction.

  According to a second aspect of the present invention, there is provided a document supporting unit that supports a document before feeding, a feeding unit that feeds a document supported by the document supporting unit to a downstream side, and a document fed from the document supporting unit. A reversing roller for curving and reversing, a reading means for reading a document going to a curved reversing path formed by the reversing roller or a document that has slipped out of the curved reversing path, and a document read by the reading means The original is guided to the reversing roller through the discharge means for discharging and the reverse feed operation of the original by the discharge means, and the surface opposite to the surface of the original read by the reading means is opposed to the reading means. And a switchback path for the purpose.

According to this aspect, since the surface of the document is read by one reading unit, the reading quality of the first surface and the second surface of the document can be made uniform. In addition, since the inside of the curved reversing path is formed by a reversing roller, the document transportation load on the curved reversing path is suppressed, and a decrease in transport accuracy can be suppressed.
With the above configuration, it is possible to adopt a configuration that takes into account both the homogenization of the reading quality of the first surface and the second surface of the document and the homogenization of the reading quality in the document transport direction.

According to a third aspect of the present invention, in the second aspect, the reversing roller is configured to bend and invert the document fed from the document support unit.
According to this aspect, the effect of the second aspect described above can be obtained in a configuration in which the reversing roller bends and reverses the original document fed from the original document supporting portion.

According to a fourth aspect of the present invention, in the second aspect, the reversing roller is characterized in that the document fed from the document support unit is bent upward and reversed.
According to this aspect, the effect of the second aspect described above can be obtained in the configuration in which the reversing roller bends and reverses the document fed from the document support unit upward.

According to a fifth aspect of the present invention, in the first or third aspect, the discharge means is located below the feeding means in the vertical direction.
According to this aspect, in the configuration in which the discharge means is positioned below the feeding means in the vertical direction, the above-described effects of the first or third aspect can be obtained.

According to a sixth aspect of the present invention, in the fourth aspect, the discharging means is located above the feeding means in the vertical direction.
According to this aspect, in the configuration in which the discharge means is located above the feeding means in the vertical direction, the operational effect of the fourth aspect described above can be obtained.

  According to a seventh aspect of the present invention, in the second aspect, the discharging means switches between a first roller and a state in which the document is nipped between the first roller and a state in which the document is separated from the first roller. And a second roller capable of separating the second roller from the first roller until the leading edge of the document passing through the switchback path reaches the discharge means again.

  According to this aspect, since the second roller is separated from the first roller until the leading edge of the document that has passed through the switchback path reaches the discharging means again, the leading edge and the trailing edge of the document are Appropriate document conveyance can be realized even if the means overlap.

An eighth aspect of the present invention is characterized in that, in the first aspect, a discharge receiving portion configured to receive a document discharged by the discharge means and configured separately from the document support portion is provided.
According to this aspect, since the discharge receiving portion configured to receive the original discharged by the discharge means is provided separately from the original support portion, the overlap between the original before feeding and the discharged original is prevented. it can.

According to a ninth aspect of the present invention, in the fourth aspect, the document discharged by the discharge unit is discharged toward the upper side of the document support portion.
According to this aspect, since the document discharged by the discharge unit is discharged toward the upper side of the document support unit, the document support unit can be used as a discharge receiving unit, and the cost of the apparatus can be reduced. Can do.

  According to a tenth aspect of the present invention, in the eighth or ninth aspect, the document support portion can be switched between a use state and a non-use state, and a flat upper surface of the apparatus is provided in the non-use state. It is characterized by comprising.

  According to this aspect, the document support portion can be switched between a use state and a non-use state, and in the non-use state, the flat top surface of the device is configured, so that the flatness of the top surface of the device is improved, It has excellent aesthetics and improves stability when a document or the like is placed on the upper surface of the apparatus.

  According to an eleventh aspect of the present invention, in any one of the first to tenth aspects, the reversing roller is provided in a central region in a document width direction that is a direction intersecting a document conveyance direction, and the document width A rotating body having a diameter corresponding to the outer diameter of the reversing roller is provided on both sides of the reversing roller in the direction.

  According to this aspect, the reversing roller is provided in a central region in the document width direction that is a direction intersecting the document conveyance direction, and the reversing roller is provided on both sides of the reversing roller in the document width direction. Since the rotating body having a diameter corresponding to the diameter is provided, the curved state of the document becomes more uniform in the document width direction, and skew can be suppressed.

1 is an external perspective view of a printer provided with an image reading apparatus according to the present invention. FIG. 3 is a perspective view showing a state in which the document conveying apparatus is opened with respect to the apparatus main body in the image reading apparatus according to the present invention. FIG. 3 is a perspective view showing a document feeding state of the document conveying device in the printer. FIG. 3 is a side sectional view showing a document conveyance path of the image reading apparatus according to the present invention. 1 is a schematic diagram of a document conveyance path of an image reading apparatus according to the present invention (first embodiment). 1 is a schematic diagram of a document conveyance path of an image reading apparatus according to the present invention (first embodiment). FIG. 10 is a schematic diagram of a document conveyance path of the image reading apparatus according to the present invention (second embodiment). FIG. 10 is a schematic diagram of a document conveyance path of the image reading apparatus according to the present invention (second embodiment). FIG. 10 is a schematic diagram of a document conveyance path of an image reading apparatus according to the present invention (third embodiment). FIG. 10 is a schematic diagram of a document conveyance path of an image reading apparatus according to the present invention (third embodiment). The top view which shows arrangement | positioning of a reversing roller and a rotary body.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure in each Example, the same code | symbol is attached | subjected and it demonstrates only in the first Example, The description of the structure is abbreviate | omitted in a subsequent Example.

  FIG. 1 is an external perspective view of a printer equipped with an image reading apparatus according to the present invention, and FIG. 2 is a perspective view showing a state in which a document conveying device is opened with respect to the apparatus main body in the image reading apparatus according to the present invention. 3 is a perspective view showing a document feeding state of the document feeding device in the printer, and FIG. 4 is a side sectional view showing a document feeding path in the image reading device.

  5 and 6 are schematic views (first embodiment) of the document conveyance path of the image reading apparatus according to the present invention, and FIGS. 7 and 8 are the same schematic views (second embodiment). 9 and 10 are the same schematic views (third embodiment). Further, FIG. 11 is a plan view showing the arrangement of the reversing roller and the rotating body.

  In the XYZ coordinate system shown in each figure, the X direction indicates the document width direction, that is, the apparatus depth direction, and the Y direction indicates the document conveyance direction in the conveyance path in the image reading apparatus, that is, the apparatus width direction. , And the Z direction indicates the device height direction.

First, the overall configuration of the printer 10 will be described with reference to FIGS. The printer 10 is configured as an ink jet printer which is an example of a recording apparatus. The printer 10 is configured as a multifunction machine including a recording device unit 12 and an image reading device 14A. The image reading device 14A is configured as a scanner unit as an example.
In the following, the overall configuration of the printer 10 will be described using the image reading device 14A according to the first embodiment, but it is needless to say that image reading devices according to other embodiments described later may be applied. .

  The image reading device 14A is rotatably connected to the rear end portion in the apparatus depth direction of the recording device unit 12, and the upper portion of the recording device unit 12 is moved by rotating the image reading device 14A to the device rear side. It is configured to be exposed. The image reading device 14 includes a device main body 16 and a document conveying device (auto document feeder) 18A.

In FIG. 2, the document conveying device 18 </ b> A is rotatably connected to the rear end portion in the apparatus depth direction of the apparatus main body 16, and the document conveying device 18 </ b> A is rotated to the apparatus rear side, thereby The document placing table 20 provided in the upper part can be opened, and the document can be set on the document placing table 20. The document table 20 is made of a transparent and flat glass plate. That is, the image reading device 14A is configured as a so-called flatbed scanner.
The “original” in this embodiment is an example of an original such as a photograph or a document.

  In FIGS. 1 and 3, a cover portion 22 constituting a “document support portion” and a discharge tray 24 are provided on the upper portion of the document conveying device 18 </ b> A. The cover portion 22 and the discharge tray 24 are rotatably attached to the document conveying device 18A, and are configured to be switchable between a non-feeding state (FIG. 1) and a feeding state (FIG. 3). . The cover portion 22 and the discharge tray 24 take a posture along the Y-axis direction and the X-axis direction in the non-feed state, and constitute a part of the upper surface 18a of the document conveying device 18A. Thereby, since the upper surface 18a of the document conveying device 18A can form a flat surface, the aesthetic appearance of the device is improved and the stability when a document or the like is placed on the upper surface of the device is improved.

  In FIG. 3, when the cover unit 22 and the discharge tray 24 are switched from the non-feeding state to the feeding state, the document supporting unit 26 that supports the document before feeding is exposed. A plurality of documents can be set on the document support unit 26, and functions as a document support unit that supports the document before feeding together with the cover unit 22 in a fed state.

  Next, the document conveyance path in the document conveyance device 18A will be described with reference to FIG. In the document conveyance path in the document conveyance device 18A, the feed roller 30, the separation roller 32, the reverse roller 34A, the document pressing unit 36, and the discharge roller pair 38 are arranged in this order from the upstream side to the downstream side. Yes.

  The feed roller 30, the separation roller 32, the reverse roller 34A, and the discharge roller pair 38 are configured to rotate by receiving power from a motor that is a power source (not shown). In addition, power is transmitted from the motor to each roller through a power transmission mechanism (not shown), but the power transmission mechanism has the same rotation direction at least for the reverse roller 34A regardless of the rotation direction of the motor. It is configured like this. Further, at least the discharge roller pair 38 is configured so that the rotation direction is switched in accordance with the rotation direction switching of the motor.

  Next, a driven roller 44 is provided at a position facing the feeding roller 30. The driven roller 44 is configured to be driven to rotate with respect to the feeding roller 30. The driven roller 44 follows the feeding roller 30 when the document fed by the feeding roller 30 runs out and the feeding roller 30 continues to rotate.

  A separation pad 31 is provided at a position facing the separation roller 32. The separation pad 31 is in contact with the separation roller 32. The separation pad 31 is made of a high friction material as an example. The plurality of documents fed by the feeding roller 30 are separated by the separation roller 32 and the separation pad 31, and only the document in contact with the separation roller 32 is sent to the reversing roller 34A disposed on the downstream side in the document transport direction. .

The reversing roller 34A is a large-diameter roller, and configures the inside of a curved reversing path for curving and reversing the document. The outer peripheral surface of the reversing roller 34A is preferably formed of a high friction material such as elastomer represented by rubber, and in this embodiment, it is formed of ethylene / propylene / diene rubber (EPDM).
The document sent out from the separation roller 32 as described above is curved and reversed by the reverse roller 34A.
Reference numeral 35 denotes a driven roller that nips the document with the reversing roller 34A.

  Next, on the downstream side of the reversing roller 34 </ b> A, a document pressing unit 36 that closes the conveyed document with the document placing table 20 is provided. On the other hand, on the lower side of the document placing table 20, a reading unit 50 serving as a “reading unit” is provided which is configured by a CIS (Contact Image Sensor) or a CCD (Charge Coupled Devices). The reading unit 50 extends in the X direction and is provided so as to be movable in the Y direction by a driving source (not shown). The reading unit 50 moves in the Y direction when reading a document placed on the document table 20, but when reading a document using the document transport device 18A, as shown in FIG. The document is stopped at a position facing the pressing unit 36, and reading is performed using a document conveying operation.

Then, the document read by the reading unit 50 is conveyed to a discharge roller pair 38 as “discharge means” provided on the downstream side of the document pressing unit 36, and is discharged to the discharge tray 24 by the discharge roller pair 38.
The discharge roller pair 38 includes a discharge roller 38a as a “first roller” driven by a motor and a driven roller 38b as a “second roller”, and the driven roller 38b further includes a release mechanism (not shown). Thus, a state where the document is nipped with the discharge roller 38a (the state shown in FIGS. 4 and 5) and a state where the document is separated from the discharge roller 38a (the state shown in FIG. 6) can be switched.

■■■ First embodiment ■■■■■■■■■■■■■■■■■■■■■■■■■■■
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 5 and 6. 5 and 6 schematically show the document conveyance path of the image reading apparatus 14A and the document conveyance apparatus 18A according to the first embodiment, and only some rollers and other main components on the document conveyance path. The other components are not shown. Further, although the document trajectory is indicated by a broken line, strictly speaking, the document conveyance path is formed by various guide members, and the illustration thereof is also omitted. This is not limited to the present embodiment, and the same applies to other embodiments described below.
In addition to this embodiment and other embodiments described below, in FIG. 5 and subsequent figures, the document support portion 26 and the cover portion 22 described with reference to FIG. 4 are collectively treated as the “document support portion 27”. And In the figure, arrow F indicates the document feeding direction, and arrow D indicates the document discharge direction.

  In the present embodiment, as shown by the arrow A, the document fed from the document support unit 27 is bent downward and reversed, and the document that has slipped out from the curved reversing path 40A formed by the reversing roller 34A is read. And a discharge roller pair 38 that discharges the document that has been read by the reading unit 50.

According to this aspect, the document sent from the document support unit 27 is configured to bend downward (arrow A) and inverted, and to read the document that has slipped out of the curved inversion path 40A. Does not affect the reading result due to the disturbance of the conveyance accuracy when entering the curved inversion path 40A.
Since the inside of the curved reversing path 40A is formed by the reversing roller 34A, the document conveying load on the curved reversing path 40A is suppressed, and the decrease in conveying accuracy can be suppressed.
With the above configuration, it is possible to achieve a configuration in consideration of both homogenization of the reading quality in the document conveyance direction.

In this embodiment, as shown in FIG. 6, the document is guided to the reverse roller 34 </ b> A through the reverse feeding operation of the document by the discharge roller pair 38 (arrow S), and the surface of the document that is read by the reading unit 50. Includes a switchback path 41 </ b> A for making the opposite surface face the reading unit 50.
That is, since the single reading unit 50 reads both sides of the document, the reading quality of the first and second surfaces of the document can be made uniform. In addition, since the inside of the curved reversing path 40A is formed by the reversing roller 34A, the document transport load on the curved reversing path 40A is suppressed, and the decrease in transport accuracy can be suppressed.
With the above configuration, it is possible to adopt a configuration that takes into account both the homogenization of the reading quality of the first surface and the second surface of the document and the homogenization of the reading quality in the document transport direction.

  In the present embodiment, the driven roller 38b that constitutes the discharge roller pair 38 as shown in FIG. 6 is replaced by the discharge roller 38a until the leading edge of the document that has passed through the switchback path 41A reaches the discharge roller pair 38 again. It is controlled to be separated from Thereby, even if the leading edge and the trailing edge of the document overlap with the discharge roller pair 38, it is possible to realize proper document conveyance. When the driven roller 38b is separated from the discharge roller 38a, the document receives a feeding force from the reversing roller 34A.

In the present embodiment, the discharge roller pair 38 is positioned below the feeding roller 30 as feeding means in the vertical direction.
In this embodiment, the discharge tray 24 serving as a discharge receiving unit that receives the document discharged by the discharge roller pair 38 is configured separately from the document support unit 27. Accordingly, it is possible to prevent the document before feeding and the document to be discharged from overlapping.

In the present embodiment, the reversing roller 34A is provided in the central area as shown in FIG. 11 in the document width direction (X direction), which is a direction intersecting the document conveying direction, and the reversing roller 34A in the document width direction. A rotating body 45 having a diameter corresponding to the outer diameter of the reversing roller 34A is provided on both sides. Thereby, the curved state of the document becomes more uniform in the document width direction, and skew can be suppressed.
Here, “the diameter corresponding to the outer diameter of the reversing roller 34 </ b> A” means that even if the outer diameter of the rotating body 45 is the same as or different from that of the reversing roller 34 </ b> A, the difference is small and the curved state of the original is changed. It means a difference that can be made uniform in the width direction.
Various arrangements of the reversing roller 34A in the document width direction (X direction) may be employed, and a plurality of the reversing rollers 34A may be provided with appropriate intervals in the document width direction.
Reference numeral 46 denotes a rotating shaft, but the rotating body 45 may be integrated with the rotating shaft 46.

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Hereinafter, the image reading device 14B and the document conveying device 18B according to the second embodiment of the present invention will be described with reference to FIGS. In the drawings showing the embodiments described below including this embodiment, the same reference numerals are given to the same configurations as those of the first embodiment already described, and the description thereof is omitted.
The present embodiment is characterized in that the document fed from the document support unit 27 is bent upward (arrow B) by the reversing roller 34B and reversed.
In the present embodiment, the document support portion 27 is provided below the discharge tray 24. The feeding roller 30 and the separation roller 32 are located on the lower side in the vertical direction than the discharge roller pair 38.
In this embodiment, the document fed from the document support unit 27 is read by the reading unit 50 before being bent and inverted.

Also in this embodiment, as shown in FIG. 8, the document is guided to the reverse roller 34 </ b> B through the reverse feeding operation of the document by the discharge roller pair 38 (arrow S), and the document read by the reading unit 50 is read. A switchback path 41 </ b> B for making the surface opposite to the surface face the reading unit 50 is provided.
That is, since the single reading unit 50 reads the surface of the document, the reading quality of the first surface and the second surface of the document can be made uniform. In addition, since the inside of the curved reversing path 40B is formed by the reversing roller 34B, the conveyance load of the document in the curved reversing path 40B is suppressed, and a decrease in conveyance accuracy can be suppressed.
With the above configuration, it is possible to adopt a configuration that takes into account both the homogenization of the reading quality of the first surface and the second surface of the document and the homogenization of the reading quality in the document transport direction.

  In this embodiment as well, the driven roller 38b is controlled so as to be separated from the discharge roller 38a as shown in FIG. 8 until the leading edge of the document via the switchback path 41B reaches the discharge roller pair 38 again. The Thereby, even if the leading edge and the trailing edge of the document overlap with the discharge roller pair 38, it is possible to realize proper document conveyance.

■■■ Third embodiment ■■■■■■■■■■■■■■■■■■■■■■■■■■■
Hereinafter, the image reading device 14C and the document conveying device 18C according to the third embodiment of the present invention will be described with reference to FIGS.
The present embodiment is characterized in that the document discharged by the discharge roller pair 38 is discharged toward the upper side of the document support portion 47. As a result, the document support portion 47 can be used as the discharge receiving portion, and the cost of the apparatus can be reduced.

  More specifically, the document support section 47 includes an edge guide 48 that regulates the edge position of the document. The edge guide 48 is formed with a flange portion 49 that restricts the number of documents placed on the document support portion 47, and the document discharged by the discharge roller pair 38 is discharged toward the upper side of the flange portion 49. Is done.

In the present embodiment, the document fed from the document support section 47 is bent upward (arrow B) by the reversing roller 34C and reversed.
In this embodiment, the document fed from the document support unit 47 is read by the reading unit 50 before being bent and inverted.
Also in this embodiment, as shown in FIG. 10, the document is guided to the reverse roller 34 </ b> C through the reverse feeding operation of the document by the discharge roller pair 38 (arrow S), and the document read by the reading unit 50 is read. A switchback path 41 </ b> C for making the surface opposite to the surface face the reading unit 50 is provided.
That is, since the single reading unit 50 reads the surface of the document, the reading quality of the first surface and the second surface of the document can be made uniform. In addition, since the inside of the curved reversing path 40C is formed by the reversing roller 34C, the transport load of the document in the curved reversing path 40C is suppressed, and a decrease in transport accuracy can be suppressed.
With the above configuration, it is possible to adopt a configuration that takes into account both the homogenization of the reading quality of the first surface and the second surface of the document and the homogenization of the reading quality in the document transport direction.

  In this embodiment as well, the driven roller 38b is controlled to be separated from the discharge roller 38a as shown in FIG. 10 until the leading edge of the document passing through the switchback path 41C reaches the discharge roller pair 38 again. The Thereby, even if the leading edge and the trailing edge of the document overlap with the discharge roller pair 38, it is possible to realize proper document conveyance.

DESCRIPTION OF SYMBOLS 10 ... Printer, 12 ... Recording device part, 14A, 14B, 14C ... Image reading device, 16 ... Apparatus main body, 18A, 18B, 18C ... Original conveying apparatus, 18a ... Upper surface, 20 ... Original document mounting table, 22 ... Cover part, 24 ... discharge tray, 26 ... document support section, 27 ... document support section, 30 ... feeding roller, 31 ... separation pad, 32 ... separation roller, 34A, 34B, 34C ... reverse roller, 35 ... driven roller, 36 ... document Pressing part, 38 ... discharge roller pair, 38a ... discharge roller, 40A, 40B, 40C ... curved reversal path, 41A, 41B, 41C ... switchback path, 45 ... rotating body, 46 ... rotating shaft, 47 ... document support part, 48: Edge guide, 49: Gutter, 50: Reading unit

Claims (11)

A document support section for supporting a document before feeding;
A feeding means for feeding the document supported by the document support section downstream;
A reversing roller for bending and reversing the document sent out from the document support unit downward;
One reading means for reading a document that has slipped out of the curved reversing path formed by the reversing roller;
A discharge means for discharging the document read by the reading means;
An image reading apparatus comprising: A document support section for supporting a document before feeding;
A feeding means for feeding the document supported by the document support section downstream;
A reversing roller for curving and reversing the document fed from the document support unit;
A reading means for reading a document heading to the curved reversing path formed by the reversing roller or a document slipping out of the curved reversing path;
A discharge means for discharging the document read by the reading means;
A switchback path for guiding the document to the reversing roller through the reverse feeding operation of the document by the discharging unit, and for making the surface opposite to the surface of the document read by the reading unit face the reading unit. When,
An image reading apparatus comprising: The image reading apparatus according to claim 2, wherein the reversing roller bends and reverses the document sent out from the document support unit.
An image reading apparatus. The image reading apparatus according to claim 2, wherein the reversing roller bends the document sent out from the document supporting unit upward and reverses the document.
An image reading apparatus. 4. The image reading apparatus according to claim 1, wherein the discharge unit is positioned below the feeding unit in a vertical direction. 5.
An image reading apparatus. The image reading apparatus according to claim 4, wherein the discharge unit is positioned above the feeding unit in the vertical direction.
An image reading apparatus. 3. The image reading apparatus according to claim 2, wherein the discharge unit is capable of switching between a first roller and a state in which a document is nipped between the first roller and a state in which the document is separated from the first roller. A roller, and
The second roller separates from the first roller until the leading edge of the document passing through the switchback path reaches the discharge means again.
An image reading apparatus. The image reading apparatus according to claim 1, further comprising a discharge receiving portion configured to receive a document discharged by the discharge unit and configured separately from the document support portion.
An image reading apparatus. 5. The image reading apparatus according to claim 4, wherein the document discharged by the discharge unit is discharged toward the upper side of the document support unit.
An image reading apparatus. 10. The image reading apparatus according to claim 8, wherein the document support portion can be switched between a use state and a non-use state, and forms a flat upper surface of the apparatus in the non-use state.
An image reading apparatus. The image reading apparatus according to any one of claims 1 to 10, wherein the reversing roller is provided in a central region in a document width direction that is a direction intersecting a document conveyance direction,
A rotating body having a diameter corresponding to the outer diameter of the reversing roller is provided on both sides of the reversing roller in the document width direction.
An image reading apparatus.

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